摘要
针对鄂尔多斯盆地西南部延长组长_7段致密油富集规律不清,致密油"甜点"分布尚未进行有效评价等问题,通过单因素地质参数统计手段,结合已知致密油油藏分布规律,深入分析延长组致密油成藏条件主控因素,预测致密油"甜点"有利区。研究表明,长_7段地质"甜点"主要评价要素为烃源岩、储集层、沉积相、裂缝发育程度及源储匹配性,预测研究区长_7段长官庙、富县等9个致密油勘探"甜点"目标,并在此基础上提出鄂尔多斯盆地大型坳陷湖盆致密油"甜点"分布模式。该研究对鄂尔多斯盆地西南部致密油勘探降低勘探风险和勘探成本等有重要的现实指导意义。
In order to clarify the tight oil enrichment pattem and the tight oil "sweet-spot"distribution in the Yanchang Formation Chang-7 Member of southwestern Ordos Basin,single-factor geological parameter statistic is used to further analyze the tight oil accumulation condition and main-controlling factors and predict the favorable zone of tight oil "sweet-spot"by combining with the tight oil reservoir distribution.Research indicates that the dominant indicators to evaluate the geological "sweet-spot"in the Chang-7 Member include source-rock,reservoir,sedimentary facies,fracture development level and source-reservoir configuration.9"sweet-spot"zones for tight oil exploration were predicted in the Chang-7 Member,including Changguanmiao,Fuxian,etc.The large-scale depression lake basin tight oil "sweet-spot"distribution pattern in Ordos Basin is proposed based on this understanding.This research could provide certain practical guidance for reducing the tight oil exploration risk and cost in southwestern Ordos Basin.
作者
孟祥振
刘聃
孟旺才
冷丹凤
陈立军
Meng Xiangzhen;Liu Dan;Meng Wangcai;Leng Danfeng;Chen Lijun(Shaanxi Yanchang Petroleum (Group)Corp.Ltd.,Xi'an,Shaanxi710075,China;State Key Laboratory of Petroleum Resources and Prospecting,China University of Petroleum (Beijing),Beijing102249,China;Unconventional Natural Gas Institute,China University of Petroleum (Beijing),Beijing102249,China)
出处
《特种油气藏》
CAS
CSCD
北大核心
2018年第6期90-95,共6页
Special Oil & Gas Reservoirs
基金
延长油田股份有限公司科技攻关项目“延长油田西部致密油成藏控制因素及富集规律研究”(YT1115SFW0069).
关键词
致密油
地质“甜点”
延长组
鄂尔多斯盆地
tight oil
geological "sweet-spot"
Yanchang Formation
Ordos Basin
